镧铬酵母中铬含量的测定  

Determination of the Chromium Content in Lanthanum-Chromium Yeast

作　　者：郝素娥[1] 张巨生[1] 丛华[1] 韦永德[1] 

机构地区：[1]哈尔滨工业大学应用化学系,哈尔滨150001

出　　处：《分析化学》2003年第7期840-842,共3页Chinese Journal of Analytical Chemistry

基　　金：黑龙江省重点攻关资助项目 (No .GB0 2B5 0 3)

摘　　要：采用在培养基中加入La2 O3的方法 ,制备得到了镧铬酵母 ,并对其总铬、无机六价铬及有机铬的含量进行了分析 ,结果表明 :镧铬酵母中总铬含量可达到 70 8.3μg g ,有机铬含量可达到 6 39.0 μg g ,是未加La2 O3的铬酵母样品的近 3倍 ;而六价无机铬占总铬的百分含量却由 1.6 0 %降至 0 .72 %。通过紫外光谱和红外光谱分析 ,发现有机铬在 2 6 0nm和 4 78cm- 1 处有特征吸收峰。The contents of total chromium, inorganic chromium(VI) and organic chromium in lanthanum-chromium yeast prepared by adding La2O3 and CrCl3 . 6H(2)O in the culture medium were determined. The results show that the contents of total chromium and organic chromium in the cultured lanthanum-chromium yeast are 708.3 mug/g and 639.0 mug/g respectively, which are three times as that of chromium yeast not adding La2O3 in the culture medium, and the content of inorganic chromium(VI) is lowered from 1.60 % to 0.72 %. It is found there are absorption peaks of organic chromium at 260 nm in ultraviolet spectra and 478 cm(-1) in infrared spectra.

关 键 词：镧铬酵母 铬 含量 测定 氧化镧 红外光谱分析 紫外光谱 微量营养元素 

分 类 号：O657.3[理学—分析化学]